@article{Cde/Pla/2002, author = "de Trazegnies Otero, Carmen and Urdiales Garc{\'i}a, Cristina and Bandera Rubio, Antonio Jes{\'u}s and Sandoval Hern{\'a}ndez, Francisco", journal = "Pattern Recognition Letters, Vol. 23, No. 10", note = " Agosto 2002 ", pages = "pp. 1143-1151", title = "{P}lanar shapes indexing and retrieval based on {H}idden {M}arkov {M}odels", year = "2002", }